package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.getListByUserIdAndSetmealId(shoppingCart);
        if (list != null && list.size() > 0) {
            Integer number = list.get(0).getNumber();
            list.get(0).setNumber(number + 1);
            shoppingCartMapper.update(list.get(0));
        } else {
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
                Dish dish = dishMapper.getByIdLong(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            } else {
                Setmeal setmeal = setmealMapper.getByLongId(shoppingCartDTO.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setNumber(1);
            shoppingCartMapper.add(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> list() {
        List<ShoppingCart> list = shoppingCartMapper.getListByUserId(BaseContext.getCurrentId());
        return list;
    }

    @Override
    public void delAllByUserId() {
        shoppingCartMapper.delAllByUserId(BaseContext.getCurrentId());
    }

    @Override
    public void sub(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.getListByUserIdAndSetmealId(shoppingCart);
        if (list != null && list.size() > 0) {
            Integer number = list.get(0).getNumber();
            if (number > 1) {
                list.get(0).setNumber(number - 1);
                shoppingCartMapper.update(list.get(0));
            } else {
                shoppingCartMapper.delById(list.get(0).getId());
            }
        }
    }

    @Override
    public List<ShoppingCart> getByUserId(Long currentId) {
        List<ShoppingCart> list = shoppingCartMapper.getListByUserId(currentId);
        return list;
    }
}
